root / htools / Ganeti / HTools / Loader.hs @ eaed5f19
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1 | 525bfb36 | Iustin Pop | {-| Generic data loader. |
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2 | 040afc35 | Iustin Pop | |
3 | e8f89bb6 | Iustin Pop | This module holds the common code for parsing the input data after it |
4 | e8f89bb6 | Iustin Pop | has been loaded from external sources. |
5 | 040afc35 | Iustin Pop | |
6 | 040afc35 | Iustin Pop | -} |
7 | 040afc35 | Iustin Pop | |
8 | e2fa2baf | Iustin Pop | {- |
9 | e2fa2baf | Iustin Pop | |
10 | d6eec019 | Iustin Pop | Copyright (C) 2009, 2010, 2011, 2012 Google Inc. |
11 | e2fa2baf | Iustin Pop | |
12 | e2fa2baf | Iustin Pop | This program is free software; you can redistribute it and/or modify |
13 | e2fa2baf | Iustin Pop | it under the terms of the GNU General Public License as published by |
14 | e2fa2baf | Iustin Pop | the Free Software Foundation; either version 2 of the License, or |
15 | e2fa2baf | Iustin Pop | (at your option) any later version. |
16 | e2fa2baf | Iustin Pop | |
17 | e2fa2baf | Iustin Pop | This program is distributed in the hope that it will be useful, but |
18 | e2fa2baf | Iustin Pop | WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | e2fa2baf | Iustin Pop | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
20 | e2fa2baf | Iustin Pop | General Public License for more details. |
21 | e2fa2baf | Iustin Pop | |
22 | e2fa2baf | Iustin Pop | You should have received a copy of the GNU General Public License |
23 | e2fa2baf | Iustin Pop | along with this program; if not, write to the Free Software |
24 | e2fa2baf | Iustin Pop | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
25 | e2fa2baf | Iustin Pop | 02110-1301, USA. |
26 | e2fa2baf | Iustin Pop | |
27 | e2fa2baf | Iustin Pop | -} |
28 | e2fa2baf | Iustin Pop | |
29 | 040afc35 | Iustin Pop | module Ganeti.HTools.Loader |
30 | ebf38064 | Iustin Pop | ( mergeData |
31 | ebf38064 | Iustin Pop | , checkData |
32 | ebf38064 | Iustin Pop | , assignIndices |
33 | ebf38064 | Iustin Pop | , lookupNode |
34 | ebf38064 | Iustin Pop | , lookupInstance |
35 | ebf38064 | Iustin Pop | , lookupGroup |
36 | ebf38064 | Iustin Pop | , commonSuffix |
37 | ebf38064 | Iustin Pop | , RqType(..) |
38 | ebf38064 | Iustin Pop | , Request(..) |
39 | ebf38064 | Iustin Pop | , ClusterData(..) |
40 | ebf38064 | Iustin Pop | , emptyCluster |
41 | ebf38064 | Iustin Pop | ) where |
42 | 040afc35 | Iustin Pop | |
43 | e4c5beaf | Iustin Pop | import Data.List |
44 | 2d0ca2c5 | Iustin Pop | import qualified Data.Map as M |
45 | 446d8827 | Iustin Pop | import Text.Printf (printf) |
46 | e4c5beaf | Iustin Pop | |
47 | e4c5beaf | Iustin Pop | import qualified Ganeti.HTools.Container as Container |
48 | e4c5beaf | Iustin Pop | import qualified Ganeti.HTools.Instance as Instance |
49 | e4c5beaf | Iustin Pop | import qualified Ganeti.HTools.Node as Node |
50 | a679e9dc | Iustin Pop | import qualified Ganeti.HTools.Group as Group |
51 | a7e1fd89 | Iustin Pop | import qualified Ganeti.HTools.Cluster as Cluster |
52 | e4c5beaf | Iustin Pop | |
53 | 2fc5653f | Iustin Pop | import Ganeti.BasicTypes |
54 | e4c5beaf | Iustin Pop | import Ganeti.HTools.Types |
55 | efe98965 | Guido Trotter | import Ganeti.HTools.Utils |
56 | e4c5beaf | Iustin Pop | |
57 | f5e67f55 | Iustin Pop | -- * Constants |
58 | f5e67f55 | Iustin Pop | |
59 | 525bfb36 | Iustin Pop | -- | The exclusion tag prefix. |
60 | f5e67f55 | Iustin Pop | exTagsPrefix :: String |
61 | f5e67f55 | Iustin Pop | exTagsPrefix = "htools:iextags:" |
62 | f5e67f55 | Iustin Pop | |
63 | 19f38ee8 | Iustin Pop | -- * Types |
64 | 19f38ee8 | Iustin Pop | |
65 | 54365762 | Iustin Pop | {-| The iallocator request type. |
66 | 19f38ee8 | Iustin Pop | |
67 | 19f38ee8 | Iustin Pop | This type denotes what request we got from Ganeti and also holds |
68 | 19f38ee8 | Iustin Pop | request-specific fields. |
69 | 19f38ee8 | Iustin Pop | |
70 | 19f38ee8 | Iustin Pop | -} |
71 | 19f38ee8 | Iustin Pop | data RqType |
72 | ebf38064 | Iustin Pop | = Allocate Instance.Instance Int -- ^ A new instance allocation |
73 | ebf38064 | Iustin Pop | | Relocate Idx Int [Ndx] -- ^ Choose a new secondary node |
74 | ebf38064 | Iustin Pop | | NodeEvacuate [Idx] EvacMode -- ^ node-evacuate mode |
75 | ebf38064 | Iustin Pop | | ChangeGroup [Gdx] [Idx] -- ^ Multi-relocate mode |
76 | 6bc39970 | Iustin Pop | deriving (Show, Read) |
77 | 19f38ee8 | Iustin Pop | |
78 | 19f38ee8 | Iustin Pop | -- | A complete request, as received from Ganeti. |
79 | 34c00528 | Iustin Pop | data Request = Request RqType ClusterData |
80 | ebf38064 | Iustin Pop | deriving (Show, Read) |
81 | 19f38ee8 | Iustin Pop | |
82 | 7b6e99b3 | Iustin Pop | -- | The cluster state. |
83 | 7b6e99b3 | Iustin Pop | data ClusterData = ClusterData |
84 | ebf38064 | Iustin Pop | { cdGroups :: Group.List -- ^ The node group list |
85 | ebf38064 | Iustin Pop | , cdNodes :: Node.List -- ^ The node list |
86 | ebf38064 | Iustin Pop | , cdInstances :: Instance.List -- ^ The instance list |
87 | ebf38064 | Iustin Pop | , cdTags :: [String] -- ^ The cluster tags |
88 | 71375ef7 | Iustin Pop | , cdIPolicy :: IPolicy -- ^ The cluster instance policy |
89 | dce9bbb3 | Iustin Pop | } deriving (Show, Read, Eq) |
90 | 7b6e99b3 | Iustin Pop | |
91 | 7b6e99b3 | Iustin Pop | -- | An empty cluster. |
92 | 7b6e99b3 | Iustin Pop | emptyCluster :: ClusterData |
93 | 7b6e99b3 | Iustin Pop | emptyCluster = ClusterData Container.empty Container.empty Container.empty [] |
94 | 71375ef7 | Iustin Pop | defIPolicy |
95 | 7b6e99b3 | Iustin Pop | |
96 | 19f38ee8 | Iustin Pop | -- * Functions |
97 | 19f38ee8 | Iustin Pop | |
98 | 9188aeef | Iustin Pop | -- | Lookups a node into an assoc list. |
99 | 6ff78049 | Iustin Pop | lookupNode :: (Monad m) => NameAssoc -> String -> String -> m Ndx |
100 | 040afc35 | Iustin Pop | lookupNode ktn inst node = |
101 | 76ae2e5b | Iustin Pop | maybe (fail $ "Unknown node '" ++ node ++ "' for instance " ++ inst) return $ |
102 | 76ae2e5b | Iustin Pop | M.lookup node ktn |
103 | 040afc35 | Iustin Pop | |
104 | 9188aeef | Iustin Pop | -- | Lookups an instance into an assoc list. |
105 | 6ff78049 | Iustin Pop | lookupInstance :: (Monad m) => NameAssoc -> String -> m Idx |
106 | 5a1edeb6 | Iustin Pop | lookupInstance kti inst = |
107 | 76ae2e5b | Iustin Pop | maybe (fail $ "Unknown instance '" ++ inst ++ "'") return $ M.lookup inst kti |
108 | 5a1edeb6 | Iustin Pop | |
109 | f4531f51 | Iustin Pop | -- | Lookups a group into an assoc list. |
110 | f4531f51 | Iustin Pop | lookupGroup :: (Monad m) => NameAssoc -> String -> String -> m Gdx |
111 | f4531f51 | Iustin Pop | lookupGroup ktg nname gname = |
112 | 76ae2e5b | Iustin Pop | maybe (fail $ "Unknown group '" ++ gname ++ "' for node " ++ nname) return $ |
113 | 76ae2e5b | Iustin Pop | M.lookup gname ktg |
114 | f4531f51 | Iustin Pop | |
115 | 9188aeef | Iustin Pop | -- | Given a list of elements (and their names), assign indices to them. |
116 | 497e30a1 | Iustin Pop | assignIndices :: (Element a) => |
117 | 497e30a1 | Iustin Pop | [(String, a)] |
118 | 99b63608 | Iustin Pop | -> (NameAssoc, Container.Container a) |
119 | 2d0ca2c5 | Iustin Pop | assignIndices nodes = |
120 | 2d0ca2c5 | Iustin Pop | let (na, idx_node) = |
121 | 2d0ca2c5 | Iustin Pop | unzip . map (\ (idx, (k, v)) -> ((k, idx), (idx, setIdx v idx))) |
122 | 2d0ca2c5 | Iustin Pop | . zip [0..] $ nodes |
123 | cb0c77ff | Iustin Pop | in (M.fromList na, Container.fromList idx_node) |
124 | 78694255 | Iustin Pop | |
125 | 9188aeef | Iustin Pop | -- | For each instance, add its index to its primary and secondary nodes. |
126 | 99b63608 | Iustin Pop | fixNodes :: Node.List |
127 | aa8d2e71 | Iustin Pop | -> Instance.Instance |
128 | 99b63608 | Iustin Pop | -> Node.List |
129 | aa8d2e71 | Iustin Pop | fixNodes accu inst = |
130 | ebf38064 | Iustin Pop | let pdx = Instance.pNode inst |
131 | ebf38064 | Iustin Pop | sdx = Instance.sNode inst |
132 | ebf38064 | Iustin Pop | pold = Container.find pdx accu |
133 | ebf38064 | Iustin Pop | pnew = Node.setPri pold inst |
134 | ebf38064 | Iustin Pop | ac2 = Container.add pdx pnew accu |
135 | ebf38064 | Iustin Pop | in if sdx /= Node.noSecondary |
136 | ebf38064 | Iustin Pop | then let sold = Container.find sdx accu |
137 | ebf38064 | Iustin Pop | snew = Node.setSec sold inst |
138 | ebf38064 | Iustin Pop | in Container.add sdx snew ac2 |
139 | ebf38064 | Iustin Pop | else ac2 |
140 | e4c5beaf | Iustin Pop | |
141 | d6eec019 | Iustin Pop | -- | Set the node's policy to its group one. Note that this requires |
142 | d6eec019 | Iustin Pop | -- the group to exist (should have been checked before), otherwise it |
143 | d6eec019 | Iustin Pop | -- will abort with a runtime error. |
144 | d6eec019 | Iustin Pop | setNodePolicy :: Group.List -> Node.Node -> Node.Node |
145 | d6eec019 | Iustin Pop | setNodePolicy gl node = |
146 | d6eec019 | Iustin Pop | let grp = Container.find (Node.group node) gl |
147 | d6eec019 | Iustin Pop | gpol = Group.iPolicy grp |
148 | d6eec019 | Iustin Pop | in Node.setPolicy gpol node |
149 | d6eec019 | Iustin Pop | |
150 | 525bfb36 | Iustin Pop | -- | Remove non-selected tags from the exclusion list. |
151 | 0f15cc76 | Iustin Pop | filterExTags :: [String] -> Instance.Instance -> Instance.Instance |
152 | 0f15cc76 | Iustin Pop | filterExTags tl inst = |
153 | ebf38064 | Iustin Pop | let old_tags = Instance.tags inst |
154 | ebf38064 | Iustin Pop | new_tags = filter (\tag -> any (`isPrefixOf` tag) tl) old_tags |
155 | ebf38064 | Iustin Pop | in inst { Instance.tags = new_tags } |
156 | 0f15cc76 | Iustin Pop | |
157 | 525bfb36 | Iustin Pop | -- | Update the movable attribute. |
158 | c6ccc073 | Guido Trotter | updateMovable :: [String] -- ^ Selected instances (if not empty) |
159 | c6ccc073 | Guido Trotter | -> [String] -- ^ Excluded instances |
160 | c6ccc073 | Guido Trotter | -> Instance.Instance -- ^ Target Instance |
161 | c6ccc073 | Guido Trotter | -> Instance.Instance -- ^ Target Instance with updated attribute |
162 | c6ccc073 | Guido Trotter | updateMovable selinsts exinsts inst = |
163 | a7667ba6 | Iustin Pop | if Instance.name inst `elem` exinsts || |
164 | ebf38064 | Iustin Pop | not (null selinsts || Instance.name inst `elem` selinsts) |
165 | 39f979b8 | Iustin Pop | then Instance.setMovable inst False |
166 | 39f979b8 | Iustin Pop | else inst |
167 | 39f979b8 | Iustin Pop | |
168 | a7e1fd89 | Iustin Pop | -- | Disables moves for instances with a split group. |
169 | a7e1fd89 | Iustin Pop | disableSplitMoves :: Node.List -> Instance.Instance -> Instance.Instance |
170 | a7e1fd89 | Iustin Pop | disableSplitMoves nl inst = |
171 | a7e1fd89 | Iustin Pop | if not . isOk . Cluster.instanceGroup nl $ inst |
172 | a7e1fd89 | Iustin Pop | then Instance.setMovable inst False |
173 | a7e1fd89 | Iustin Pop | else inst |
174 | a7e1fd89 | Iustin Pop | |
175 | f9fc7a63 | Iustin Pop | -- | Compute the longest common suffix of a list of strings that |
176 | 525bfb36 | Iustin Pop | -- starts with a dot. |
177 | 8472a321 | Iustin Pop | longestDomain :: [String] -> String |
178 | e4c5beaf | Iustin Pop | longestDomain [] = "" |
179 | 8472a321 | Iustin Pop | longestDomain (x:xs) = |
180 | ebf38064 | Iustin Pop | foldr (\ suffix accu -> if all (isSuffixOf suffix) xs |
181 | ebf38064 | Iustin Pop | then suffix |
182 | ebf38064 | Iustin Pop | else accu) |
183 | ebf38064 | Iustin Pop | "" $ filter (isPrefixOf ".") (tails x) |
184 | e4c5beaf | Iustin Pop | |
185 | 525bfb36 | Iustin Pop | -- | Extracts the exclusion tags from the cluster configuration. |
186 | f5e67f55 | Iustin Pop | extractExTags :: [String] -> [String] |
187 | f5e67f55 | Iustin Pop | extractExTags = |
188 | ebf38064 | Iustin Pop | map (drop (length exTagsPrefix)) . |
189 | ebf38064 | Iustin Pop | filter (isPrefixOf exTagsPrefix) |
190 | f5e67f55 | Iustin Pop | |
191 | 525bfb36 | Iustin Pop | -- | Extracts the common suffix from node\/instance names. |
192 | 3e4480e0 | Iustin Pop | commonSuffix :: Node.List -> Instance.List -> String |
193 | 3e4480e0 | Iustin Pop | commonSuffix nl il = |
194 | ebf38064 | Iustin Pop | let node_names = map Node.name $ Container.elems nl |
195 | ebf38064 | Iustin Pop | inst_names = map Instance.name $ Container.elems il |
196 | ebf38064 | Iustin Pop | in longestDomain (node_names ++ inst_names) |
197 | 3e4480e0 | Iustin Pop | |
198 | 9188aeef | Iustin Pop | -- | Initializer function that loads the data from a node and instance |
199 | 9188aeef | Iustin Pop | -- list and massages it into the correct format. |
200 | aa8d2e71 | Iustin Pop | mergeData :: [(String, DynUtil)] -- ^ Instance utilisation data |
201 | 0f15cc76 | Iustin Pop | -> [String] -- ^ Exclusion tags |
202 | 2d1708e0 | Guido Trotter | -> [String] -- ^ Selected instances (if not empty) |
203 | 2d1708e0 | Guido Trotter | -> [String] -- ^ Excluded instances |
204 | f4f6eb0b | Iustin Pop | -> ClusterData -- ^ Data from backends |
205 | c0e31451 | Iustin Pop | -> Result ClusterData -- ^ Fixed cluster data |
206 | d6eec019 | Iustin Pop | mergeData um extags selinsts exinsts cdata@(ClusterData gl nl il2 tags _) = |
207 | 99b63608 | Iustin Pop | let il = Container.elems il2 |
208 | a5f8dcdc | Iustin Pop | il3 = foldl' (\im (name, n_util) -> |
209 | a5f8dcdc | Iustin Pop | case Container.findByName im name of |
210 | a5f8dcdc | Iustin Pop | Nothing -> im -- skipping unknown instance |
211 | a5f8dcdc | Iustin Pop | Just inst -> |
212 | a5f8dcdc | Iustin Pop | let new_i = inst { Instance.util = n_util } |
213 | a5f8dcdc | Iustin Pop | in Container.add (Instance.idx inst) new_i im |
214 | a5f8dcdc | Iustin Pop | ) il2 um |
215 | f5e67f55 | Iustin Pop | allextags = extags ++ extractExTags tags |
216 | 424ec11d | Guido Trotter | inst_names = map Instance.name il |
217 | 424ec11d | Guido Trotter | selinst_lkp = map (lookupName inst_names) selinsts |
218 | 424ec11d | Guido Trotter | exinst_lkp = map (lookupName inst_names) exinsts |
219 | 424ec11d | Guido Trotter | lkp_unknown = filter (not . goodLookupResult) (selinst_lkp ++ exinst_lkp) |
220 | 424ec11d | Guido Trotter | selinst_names = map lrContent selinst_lkp |
221 | 424ec11d | Guido Trotter | exinst_names = map lrContent exinst_lkp |
222 | 99b63608 | Iustin Pop | node_names = map Node.name (Container.elems nl) |
223 | 8472a321 | Iustin Pop | common_suffix = longestDomain (node_names ++ inst_names) |
224 | cdbab531 | Iustin Pop | il4 = Container.map (computeAlias common_suffix . |
225 | cdbab531 | Iustin Pop | filterExTags allextags . |
226 | cdbab531 | Iustin Pop | updateMovable selinst_names exinst_names) il3 |
227 | cdbab531 | Iustin Pop | nl2 = foldl' fixNodes nl (Container.elems il4) |
228 | d6eec019 | Iustin Pop | nl3 = Container.map (setNodePolicy gl . |
229 | d6eec019 | Iustin Pop | computeAlias common_suffix . |
230 | cdbab531 | Iustin Pop | (`Node.buildPeers` il4)) nl2 |
231 | a7e1fd89 | Iustin Pop | il5 = Container.map (disableSplitMoves nl3) il4 |
232 | 424ec11d | Guido Trotter | in if' (null lkp_unknown) |
233 | a7e1fd89 | Iustin Pop | (Ok cdata { cdNodes = nl3, cdInstances = il5 }) |
234 | 424ec11d | Guido Trotter | (Bad $ "Unknown instance(s): " ++ show(map lrContent lkp_unknown)) |
235 | 446d8827 | Iustin Pop | |
236 | 9188aeef | Iustin Pop | -- | Checks the cluster data for consistency. |
237 | 262a08a2 | Iustin Pop | checkData :: Node.List -> Instance.List |
238 | 262a08a2 | Iustin Pop | -> ([String], Node.List) |
239 | dbd6700b | Iustin Pop | checkData nl il = |
240 | 446d8827 | Iustin Pop | Container.mapAccum |
241 | 446d8827 | Iustin Pop | (\ msgs node -> |
242 | dbd6700b | Iustin Pop | let nname = Node.name node |
243 | 5182e970 | Iustin Pop | nilst = map (`Container.find` il) (Node.pList node) |
244 | 61bbbed7 | Agata Murawska | dilst = filter Instance.instanceDown nilst |
245 | 446d8827 | Iustin Pop | adj_mem = sum . map Instance.mem $ dilst |
246 | 2060348b | Iustin Pop | delta_mem = truncate (Node.tMem node) |
247 | 2060348b | Iustin Pop | - Node.nMem node |
248 | 2060348b | Iustin Pop | - Node.fMem node |
249 | 9f6dcdea | Iustin Pop | - nodeImem node il |
250 | 446d8827 | Iustin Pop | + adj_mem |
251 | 2060348b | Iustin Pop | delta_dsk = truncate (Node.tDsk node) |
252 | 2060348b | Iustin Pop | - Node.fDsk node |
253 | 9f6dcdea | Iustin Pop | - nodeIdsk node il |
254 | 446d8827 | Iustin Pop | newn = Node.setFmem (Node.setXmem node delta_mem) |
255 | 2060348b | Iustin Pop | (Node.fMem node - adj_mem) |
256 | bdd8c739 | Iustin Pop | umsg1 = |
257 | bdd8c739 | Iustin Pop | if delta_mem > 512 || delta_dsk > 1024 |
258 | 3603605a | Iustin Pop | then printf "node %s is missing %d MB ram \ |
259 | 3603605a | Iustin Pop | \and %d GB disk" |
260 | 3603605a | Iustin Pop | nname delta_mem (delta_dsk `div` 1024):msgs |
261 | bdd8c739 | Iustin Pop | else msgs |
262 | bdd8c739 | Iustin Pop | in (umsg1, newn) |
263 | 446d8827 | Iustin Pop | ) [] nl |
264 | 446d8827 | Iustin Pop | |
265 | 446d8827 | Iustin Pop | -- | Compute the amount of memory used by primary instances on a node. |
266 | 262a08a2 | Iustin Pop | nodeImem :: Node.Node -> Instance.List -> Int |
267 | 446d8827 | Iustin Pop | nodeImem node il = |
268 | ebf38064 | Iustin Pop | let rfind = flip Container.find il |
269 | ebf38064 | Iustin Pop | il' = map rfind $ Node.pList node |
270 | 7959cbb9 | Iustin Pop | oil' = filter Instance.notOffline il' |
271 | ebf38064 | Iustin Pop | in sum . map Instance.mem $ oil' |
272 | 61bbbed7 | Agata Murawska | |
273 | 446d8827 | Iustin Pop | |
274 | 446d8827 | Iustin Pop | -- | Compute the amount of disk used by instances on a node (either primary |
275 | 446d8827 | Iustin Pop | -- or secondary). |
276 | 262a08a2 | Iustin Pop | nodeIdsk :: Node.Node -> Instance.List -> Int |
277 | 446d8827 | Iustin Pop | nodeIdsk node il = |
278 | ebf38064 | Iustin Pop | let rfind = flip Container.find il |
279 | ebf38064 | Iustin Pop | in sum . map (Instance.dsk . rfind) |
280 | ebf38064 | Iustin Pop | $ Node.pList node ++ Node.sList node |